Scientists divide the Earth into
a number of different vegetation zones, also known as “biomes”. The plant and
animal life found in each zone depends on the region’s climate, landscape, and
latitude. Over millions of years, plants and animals have adapted to life in
this range of climates, often developing special features that have helped them
to survive. The map also highlights how similar landscapes, such as taiga or desert,
occur at the same latitude across the world.
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POLAR AND TUNDRA |
POLAR AND TUNDRA
The areas around the North
and South poles are freezing cold and covered in ice. South of the North Pole
lies a region called the tundra where the lower layers of soil are permanently
frozen. Hardy mosses, lichens, and shrubs are the only plants that can survive
here.
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TAIGA |
TAIGA
In Russian, the word taiga
means “cold forest.” It describes the vast evergreen forests that stretch
across northern Canada, Scandinavia, and the Russian Federation. Evergreen
trees, such as fir, spruce, and pine, are well-adapted to the long, snowy
winters.
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MOUNTAIN REGIONS |
MOUNTAIN REGIONS
The higher up a mountain you
go, the colder it gets. Trees and plants grow on the lower slopes of many
mountains. But above a certain level, called the tree line, it is too cold and
windy for plants to survive. High mountain peaks are often covered in snow all
year round.
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TEMPERATE FOREST |
TEMPERATE FOREST
Much of the land in northern
Europe and North America was once covered by deciduous forests (trees that lose
their leaves in winter). Most of these have now been cut down. Deciduous trees
grow well in temperate climates where it is never very hot or very cold.
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MEDITERRANEAN |
MEDITERRANEAN
Areas with a Mediterranean
climate have hot, dry summers and cool, wet winters. They include land around
the Mediterranean Sea and other similar places, such as California in the US.
Plants and trees, such as olives, have adapted to survive the lack of water in
summer.
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DRY GRASSLAND |
DRY GRASSLAND
Vast grasslands cover the
centers of some of the continents. They include the South American pampas and
the North American prairies. They have hot, dry summers and very cold winters.
Large parts of these grasslands are now plowed for wheat or used to raise
cattle.
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TROPICAL RAIN FOREST |
TROPICAL RAIN FOREST
Around the equator, the
climate is hot and wet all year round, and providing ideal conditions for lush,
green tropical forests to thrive. The world’s rain forests may contain 50,000
different types of trees, as well as millions of other species of plants and
animals.
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HOT DESERT |
HOT DESERT
Deserts are the hottest,
driest places on Earth. Despite heat during the day, temperatures may plunge to
below freezing at night. In some deserts, years pass without rain. Deserts
often contain sandy soil that can only support plants such as cacti.
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TROPICAL GRASSLAND |
TROPICAL GRASSLAND
Between the hot deserts and
tropical rain forests lie tropical grasslands, such as the African savanna. The
climate here is always hot, but the year is divided into a wet and a dry season.
Tall grasses, as well as low trees and shrubs, grow in these hot areas.